Oscillating lamp



Oct. 11, 1938. c. s. MONROE OSCILLATING LAMP Filed Aug. 19,1957 2 Sheets-Sheet l Patented Oct. 11, 1938 UNITED STATES 2,123,106 oscmm'nnc LAMP Charles s. Monroe, Chicago, In. Application August 19, 193-1, Serial'No. 159,926

. Claims. (01. 240-48) This invention relates to a class of electric lamps to some extent used on automobiles and similar motor vehicles wherein the lamp is pivotally mounted to oscillate horizontally or verti- 5 cally or under a. compound horizontal and vertical movement to light up the road and particularly the edges and shoulders of the road at night; the oscillating movement being effected by a motor under the control of the driver.

The primary purpose of my improved lamp is to serve as what I term a passing" lamp, to signal, by a horizontally oscillating light beam, to a car ahead that the driver desires to pass. The main object of the invention has been to provide a very simple, practical and inexpensive lamp of this type.

Other objects and attendant advantages of the invention will be apparent to persons familiar with lamps of this character from the following detailed description taken in connection with the accompanying drawings in which I have shown an illustrative embodiment of the invention and wherein:-

- Fig. 1 is a top plan view with the hood or casing in horizontal section.

Fig. 2 is a side elevation, with the hood or casing in vertical section on the line 2--2 of Fig. 1,

and broken ofl at the front.

Fig. 3 is a sectional detail showing the means so for pivoting the reflector in the arms 'of the frame.

Fig. 4 is a transverse section taken on the 0H- set line 4-2 of Fig'. 2.

Fig. 5 is a fragmentary side elevation illustrat- 5 mg a modification.

Fig. 6 is a transverse section on the line 6-6 of Fig. 5.

Referring to the drawings, l0 designates a metal hood or casing preferably of the shape' il- 40 lustrated in Figs. 1 and 2, which contains the lamp, its mounting frame, motor, and motoractuated oscillating means. The forward open end of the hood I2 is closed by a glass lens ll mounted in a suitable rim l2 which flts over an 45 inwardly offset rim l0 of the hood and is removably locked thereto by pins I 2 engaged with holes in the rim Ill locked against displacement by one or more spring keepers II.

The supporting frame for the lamp and motor 5 is preferably a casting having a flat base plate l6 and a pair of upper and lower forwardly extending arms l6 and I1 respectively. The inner portion ll of the lower arm I! is widened and concaved on its lower side to fit the casing l0, and

as provided with a pair of tapped holes It to receive PATENT OFFICE nussuto MAY 12 1942 screws It, the said screws also serving to moimt the casing It on a seat or saddle 20 carried by an upright post 2| that'may be mounted in any suitable position on the forward portion of the motor vehicle, sumciently in rear of the front 5 bumper to protect the lamp from damage.

Lying between the arms l6 and ll of the frame and pivoted in the free ends of said arm is a yoke 22 formed with a central aperture through which extends the shank or stem 22 of a bowll0 shaped lamp reflector 24; the hollow shank 22 also supporting a lamp socket 26, in the forward end of which is mounted the electric lamp bulb 26. Fig. 3 illustrates the preferred means of mounting and pivoting the yoke and reflector in 15 the arms of the frame, whereby it will be seen that the reflector 24 is formed with a peripheral flange 21 that is soldered at 26 to the ends of the arms of yoke 22; and the frame arms l6 and i1 and the arms of the yoke 22 have registering holes 20 29 and 20 respectively, to receive a pivot pin 2| formed with an integral spacing washer 22 that, when the parts are assembled, prevents the escape of the pin. I

Attached to the rear side of the base I! of the 25 frame as by screws 22 is the frame base 24 of a small electric motor, preferablyof the oscillating type such as is used to actuate windshield wipers, although a rotary motor may be employed. This motor is not shown in detail as it is a known com- 30 mercial article, and the main portion of the frame, the field, armature, etc., are covered by a cap 25 attached by screws 26. Through speed reducing gearing (not shown) the motor oscillates a forwardly projecting shaft 21 which extends through a hole in the frame base I6 and is formed with an offset or crank arm 21', which latter, as best shown in Fig. 4, lies within a vertical slot as formed in the lamp and neflector carrying yoke 22, as a result of which, when the motor is energized, the oscillations of the shaft 21 transmit horizontal oscillations to the reflector 24 and lamp 26 carried by the yoke 22, so that, if the lamp is lighted, a horizontal beam of light is thrown back and forth from side to side of the road. It is obvious that if the motor transmits a continuous rotary movement to the shaft 21, the result will be the same, the slot 22 being of sufficient length to accommodate the maximum high and low positions of the crank 21'. The portion of yoke 22 engaged by the crank 21' forms in effect a reflector oscillating arm that extends parallel with the pivot axis of the reflector.

Figs. 5 and 6 illustrate a modification, wherein the yoke 22 is dispensed with, and the reflector 5 24' is formed with a peripheral rim or band 39 that is directly pivoted to and between the yoke arms l6 and II by the pivot pins ll; and mounted on and soldered to the hollow reflector shank or stem 40 is a wire coil 4| formed with a tangential integral loop 42 lying parallel with the pivot axis of the reflector that receives and cooperates with the crank 31' of the shaft 31 in the same way and to the same effect as the slot 38 of the yoke 22 previously described.

It is to be understood that in practice the motor and lamp circuit is wired through the usual generator to the dash of the car and is equipped at the dash with a normally open switch that may be closed by the driver as he approaches a vehicle which he wishes to pass, the waving light beam constituting a signal to the'car ahead to allow room for passing.

I am aware that mechanically oscillated lamps for automobiles are broadly known; but such lamps have heretofore been unduly complicated and expensive. It will be seen. that my improved lamp is of very simple and relatively inexpensive construction, requiring no gears (except the usual speed reducing gears associated with the motor) and certain and reliable in action. The structural details herein shown and described may, obviously, be varied within the: purview and scope of the appended claims.

I claim:

1. In an oscillating lamp of the type described, the combination of a frame structure including a pair of diametrically spaced arms extending forwardly from the rear of said frame and disposed in a vertical plane, a bowl-shaped reflector pivoted at diametrically opposite points of its periphery on and between the free ends of said arms, a lamp socket and lamp mounted in said reflector, an arm fast with said reflector and extending parallel with the pivot axis of the latter, a motor mounted on said frame, and a motor driven shaft having a crank drivingly engaged with said last mentioned arm in a manner to swing the latter sidewise to thereby oscillate said reflector and lamp.

2. In an oscillating lamp of the type described, the combination of a frame structure including a pair of diametrically spaced arms extending for- 4 wardly from the rear of said frame and disposed in a vertical plane, a bowl-shaped reflector pivoted at diametrically opposite points of its periphery on and between the free ends of said arms, and having a central hollow stem, a lamp socket mounted in said stem, a lamp bulb mounted in said socket, a lateral arm on said stem extending parallel with the pivot axis of said reflector, a motor mounted on said frame, and a motor driven shaft extending forwardly between said spaced arms and terminating in a crank engaged with said lateral arm in a manner to swing the latter sidewise and thereby oscillate said reflector and lamp.

3. In an oscillating lamp of the type described, the combination of a frame having a base plate and a pair of forwardly extending arms springing from said base plate, a bowl-shaped reflector pivoted at diametrically'opposite points of its periphery on and between the free ends of said arms and having a central hollow stem, a lamp socket mounted in said stem, a lamp bulb mounted in said socket, a lateral arm on said stem, a motor mounted on the rear side of said base plate, and a motor driven shaft extending forwardly of said base plate between and substantially parallel with said arms and terminating in a crank engaged with said lateral arm.

4. In an oscillating lamp of the type described, the combination of a frame structure including a pair of diametrically spaced arms extending forwardly from the rear of said frame, a bowl-shaped reflector having a hollow stem, a yoke having its transverse limb mounted on said stem and its arms secured at their free ends to the peripheral portion of said reflector and pivoted to and between the spaced arms of said frame structure, the transverse limb of said yoke having a slot extending substantially radially of said reflector, a lamp socket mounted in said stem, a lamp bulb mounted in said socket, an electric motor mounted on the rear end of said frame, and a motor driven shaft extending between said frame arms and terminating in a crank extending through said slot.

5. In an oscillating lamp of the type described, the combination of a frame structure including a pair of diametrically spaced arms extending forwardly from the rear of said frame, a bowlshaped reflector pivoted at diametrically opposite points of its periphery to and between the free ends of said arms and having .a central hollow stem, a lamp socket and lamp mounted in said stem, a wire coil fast on said stem and formed with an integral loop extending tangentially of said stem, a motor mounted on said frame, and a motor driven shaft having a crank drivingly engaged with said loop to thereby oscillate said reflector and lamp.

CHARLES S. MONROE. 

